Spotlight Search has been completely redesigned in Yosemite from the old Spotlight Menu function. You can still search for files, but in addition you'll get information from the Internet such as movie times, Wikipedia, maps and recommended web pages. You can also do unit and currency conversions and math. File searches can be filtered by kind and date. You can also use logical functions like OR and - (not) to get better results. Find out all you can do with Spotlight Search in Yosemite.
Save dialogs in Mountain Lion have two different modes: compact and expanded. Learn how to easily switch between them. The last setting is remembered, but you can also set a default using the Terminal. Also learn how to switch between saving to iCloud and saving to your local hard drive. You also have two modes in the Print dialog.